سه شنبه 11 اردیبهشت 1403
| عنوان مقاله | |
| عنوان مقاله |
High-Frequency-Link-Based Grid-Tied PV System With Small DC-Link Capacitor and Low-Frequency Ripple-Free Maximum Power Point Tracking |
| عنوان فارسی مقاله | سیستم PV گرید گره خورده مبتنی بر فرکانس بالا با خازن کوچک DC-Link و ردیابی نقطه حداکثر فرکانس پایین فرکانس پایین |
| مشخصات مقاله انگلیسی | |
| نشریه: Ieee |
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| سال انتشار |
2016 |
| عنوان مجله |
Transactions on Power Electronics |
| تعداد صفحات مقاله انگلیسی | 12 |
| رفرنس | دارد |
| تعداد رفرنس | 27 |
| چکیده مقاله | |
| چکیده |
—This paper proposes a grid-tied photovoltaic (PV) system consisting of modular current-fed dual-active-bridge (CFDAB) dc–dc converter with cascaded multilevel inverter. The proposed converter allows a small dc-link capacitor in the three-phase wye-connected PV system; therefore, the system reliability can be improved by replacing electrolytic capacitors with film capacitors. The low-frequency ripple-free maximum power point tracking (MPPT) is also realized in the proposed converter. First of all, to minimize the influence resulting from reduced capacitance, a dclink voltage synchronizing control is developed. Then, a detailed design of power mitigation control based on CF-DAB dynamic model is presented to prevent the large low-frequency voltage variation propagating from the dc-link to PV side. Finally, a novel variable step-size MPPT algorithm is proposed to ensure not only high MPPT efficiency, but also fast maximum power extraction under rapid irradiation change. A downscaled 5-kW PV converter module with a small dc-link capacitor was built in the laboratory with the proposed control and MPPT algorithm, and experimental results are given to validate the converter performance. |
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| دانلود | |
